Intermittent-alarm clock.



PATENTED SEPT. 11, 1906.

G. L. GOODRICH. INTERMITTENT ALARM CLOCK.

APPLICATION FILED JANF| 1906.

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PATENTED SEPT 11-, 1906.

G. L. GOODRIGH.

INTERMITTENT ALARM CLOCK.

APPLICATION FILED JAN.8.1906.

2 SHEETS-SHEET 2.

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UNITED STATES PATENT OFFICE.

GEORGE L. GOODRICH, OF BRISTOL, CONNECTICUT, ASSIGNOR TO THE E. INGRAHAMCO., OF BRISTOL, CONNECTICUT, A CORPORATION.

lNTERMlTTENT-ALARM CLOCK- Specification of Letters Patent.

Patented Sept. 11, 1906.

Application filed January 8,1906. Serial No. 295,069-

To all] wit/mt it iii/by concern:

Be it known that 1, GEORGE L. Goonnrcn, a citizen of the United States,residing at Bristol, in the county of Hartford andv State ofConnecticut, have invented a new and useful Improvement in IntermittentAlarm Clocks; and I do hereby declare the following, when taken inconnection with the accompanying drawings and the figures of referencemarked thereon, to be a full, clear, and exact description of the same,and which said drawings constitute part of this specification, andrepresent, in

Figure 1, a partial view, in front elevation, of anintermittent-alarm-clock movement constructed in accordance with myinvention, the front movement-plate being removed; Fig. 2, a side viewthereof; Fig. 3, a plan view thereof; Fig. 4, a detached view of theoscillating intermittent-alarm lever.

My invention relates to an improvement in intermittentalarm clocks, theobject being to provide simple, durable, and reliable alarm mechanismfor such clocks.

With these ends in view my invention con sists in a clock having certaindetails of con struction and combinations of parts, as will behereinafter described, and pointed out in the claims.

In carrying out my invention, as herein shown, I mount an oscillatoryalarm-lever 2, having a bearing-hole 3, upon the center arbor 4, whichpasses through the said hole. The said lever is formed at its upper endwith a ring-lil e cam 5, containing a stop-tooth 6 and receiving a pin7, extending rearward into it from an escapement-wheel 8, enga ed by averge 9, mounted upon a verge-ar or 10, carrying a hammer-arm 1 1(broken away) and provided with a depending stop-wire 1.2, coacting withthe usual let-off spring 13. The wheel 8 is driven by a wheel 14, drivenby the main wheel 1 5, which is mounted upon a winding arbor 16,carrying the alarmspring. (Not shown.) The alarm-train may be of anyapproved construction and has nothing added to it more than the pin 7 inthe wheel 8.

At its lower end and upon its inner face the lever 2 is furnished, asshown, with two pawls 17 18, operated by springs 19 19 and arranged toengage with the teeth of the minute-wheel 20 of the time-train, thiswheel being frictionally mounted in the usual manner upon the centerarbor 4 and driven by a lantern-pinion 21, meshed into by the time mainwheel 22, which is mounted on the time winding-arbor 23, upon which thetimespring is wound. The time-train may be of any approved constructionand is unmodified for the purposes of my invention.

When in the operation of the clock the letoff spring 13 is released andpermitted. to disengage itself from the stop wire 12, the alarm-train isrestrained by the engagement of the pin 7 with the tooth 6 of the lever2 and by the engagement of one or the other of the pawls 17 and 18 witha tooth of the wheel 20. WVith the lever 2 thus coupled by one of thepawls 17 and 1.8 with the wheel 20 the lever will be slowly rocked untilthe tooth 6 has been sufficiently inclined to release the pin 7, andhence the alarm-train, which will at once start and sound the alarm. Nowas the escapement wheel 8 revolves the pin 7 will coact with the inneredge of the cam 5 and oscillate the lever 2, the pawls 17 and 18 ofwhich will be moved back and forth under the teeth of the wheel 20 butthe pin 7 will continue to ride over the stoptooth 6 until the wheel 20presents a tooth in such a way to the pawl 17 or to the pawl 18 as topermit either one to be reengaged with the wheel. Vhen this takes place,the pin 7 when it strikes the stop-tooth 6 can no longer swing the lever2 sufficiently to ride over and so escape from the said tooth; but thelever, being coupled to the wheel 20, will be held rigidly, with theresult of stopping the alarmtrain. The power of the alarm-spring, how-'ever, will still act, through the pin 7, to

slowly rock the lever 2 from left to right until it has been rocked. farenough to release the pin 7, when the alarm will be sounded again andthe lever 2 oscillated until the other of its two pawls 17 and 18 hasbeen engaged with a tooth of the wheel 20 and the alarm-train againstopped. In this way the alarm will be intermittently sounded until thealarm-spring runs down or until the alarm side of the clock has been cutout in any convenient manner-as, for instance, by a stop-cam 24,arranged. to coact with the verge 9 and mounted upon an arbor 25,furnished at its rear end with a finger 26.

Instead. of employing two alternately-opcrating pawls 17 and 18 I mayemploy one.

This needs no illustration. The construction and mode of operationremain the same, with the single difference that the alarm sounds twiceas long. Two pawls divide," so to speak, each tooth interval on thewheel 20. In carrying out my invention I may therefore make some chan esfrom the construction herein shown. %would therefore have it understoodthat I do not limit myself thereto, but hold myself at liberty. to makesuch departures therefrom as fairly fall within the spirit and scope ofmy invention.

I claim-- 1. In an intermittent alarm clock, the combination with thetime and alarm trains thereof, of an oscillating alarm-lever coactingwith a member of the alarm-train for oscillation thereby, and one ormore pawls pivotally mounted upon the said oscillating alarmlever andcoacting with one of the wheels of the time-train. 2. In anintermittentalarm clock, the combination with the time and alarm trainsthereof, of an oscillating alarm-lever formed at one end with a cam anda stop-tooth, a pin mounted in one of the wheels of the alarmtrain forcoacting with the said cam and stop* tooth, and one or more sprinactuated pawls carried by the lower end 0 the said lever and coactingwith one of the wheels of the time-train.

3. In an intermittentalarm clock, the combination with the time andalarm trains thereof, of' a stop-pin located in the escapement-wheel ofthe alarm-train, an oscillating alarm-lever fulcrumed concentricallywith the center arbor of the time-train and formed at its upper end witha cam coacting with the said pin for oscillating the lever and with astop-tooth coacting with the said pin for stopping the alarm-train, andmeans carried by the said lever for coupling it with a Wheel of thetime-train.

In testimony whereof I have signed this specification in the presence oftwo subscriblng witnesses.

GEORGE L. GOODRICH.

Witnesses:

S. W. HOWE, M. F. MANOR.

